Loading…
Loading…
GCSE Combined Science · key term
The mass per mole of a substance, measured in g/mol. Its numerical value equals the substance’s relative formula mass.
Used by AQA and Edexcel
Specification 5.3.2.1, 5.3.2.3 · Paper 3
Revise: MolesIts molar mass—the mass per mole—is 18 g/mol. The relative formula mass itself has no unit.
The mass of one mole of a substance, usually expressed in g/mol. Its numerical value equals the substance’s relative formula mass.
Relative formula mass has no unit. The mass of one mole is measured in grams; molar mass is measured in g/mol.
Use mass in grams when the molar mass is in g mol⁻¹. Convert kilograms or milligrams first.
Create a free account to read GCSE Combined Science revision notes for your exam board and track your progress.
Specification Calculations involving masses · Paper 3, Paper 4
The mass of one mole of a substance, measured in g mol⁻¹. Its numerical value equals the appropriate relative particle mass.
Revise: Moles, masses and particle numbersNotice the distinction: relative mass has no unit, whereas molar mass has units of g mol⁻¹.